Comprehensive service field providing design, development, implementation, operation, maintenance, and support for manufacturing business systems including production management systems, quality management systems, and inventory management systems. Encompasses MES (Manufacturing Execution Systems), ERP, PLM, CAD/CAM system construction, existing system modification and customization, cloud migration, database design, system integration, and 24/7 monitoring and operational services. Distinguished from standalone hardware equipment or software license sales, this field primarily focuses on specialized technical service delivery by professional engineers.